The Harley I had (dyna ) I put progressive shocks, front springs and changed fork oil. I had floating rotors and sintered pads....I could all most lift the back up using the front brake...Maybe the my speedmaster could do the same thing....with the changes I made to the Harley no one could keep up with me (riding the same style bike, sportbike would kick my ******) in the turns....I could carry speed into a turn and out brake other bikes. But I did alot of track days on a sportbike also.
All of that aaid, all the riding books, and rider courses all say about 60-70% front bake and 40-30% rear baking....